<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>

<body>
<?php
require_once '../../inc.php';
echo PHP_VERSION;
?>
<?php
function one($str1, $str2)
 {
 two("Glenn", "Quagmire");
 }
function two($str1, $str2)
 {
 three("Cleveland", "Brown");
 }
function three($str1, $str2)
 {
 secho(debug_backtrace());
 }

one("Peter", "Griffin");
?> 
</body>
</html>